Choff



T. ROGATCHOFF.

GROSS HEAD FOR ENGINES. AEPLlcATlou FILED DEc.9. 191s.

v 5mm/woz X25/gada?? Patented May 13, 1919.

r 2 SHEETS-SHEET l.

APPL

T. noGATcHoFF.

OSS HEAD FOR ENGINES.

ICATION FILED DEC.9l 1918.

Patented May 13, 1919.

2 SHEETS-SHEET 2.

n an sans aan THEODORE ROG-ATCHOFF, OF BALTIMORE, MARYLND.

GROSS-HEAD FOR ENGINES.

1,303.9??28. Specification of Letters Patent. Patengqgd it/5gg 139 1919,

Application led December 9, 1918. Serial No. 265,954.

designates a piston stem fastened to the cross head -by the key 9.

Bolts 10 pass through apertures in the Vsides of the cross head and also in channels To all whom t may concern: cross heads, 4and 8 Be it known that THnononr. RoosmoHorF, a citizen of the Repub-hc of Russia, residing at Baltimore, in the city of Baltimore and State of Maryland, have invented or grooves 1() formed in the inner edges of 60 certain new and useful improvements in the two gibs, said gibs being shown in dot- Cross-Heads for Engines, of which the folted lines in Fig. 1 ofthe drawings. It will lowing is a specification, reference being had be noted that 'the opposite faces of the gibs therein to the accompanying dra-Wing. are provi-ded with recesses,- one wall of each 10 This invention relates to new and useful recess being beveled or inclined and its outer 65 improvements in adjustable cross heads and Wall lat right angles to the outer aoe of the consists essentially in the provision of means gib, the inclined wall of the recess being enfor taking urp wear, comp-rising wedge gaged {by the inclined portion upon the'inshaped members guided in grooves in the ner portions of the sides 3 and 4, thus 3.5 cross head, and having means for holding forming a dove-tailed connection. rlhe'bolts 70 the gibs in 'adjusted positions. A'10 have heads countersunk in the side 3 and The invention consists further in the pronuts are fitted to the threaded ends of the vision of a c-ross head made up of sections bolts to holdthe sides against the gibs. The held together by bolts and havingy doveopposite edges of the sides 3 and l are init@ tailed connection with gibs, which are held olined, as shown in Fig. 1 of the drawings, 7 5 in different adjusted positions through the and each inclined edge of the side is promedium of longitudinally movable wedge vided with a longitudinal channel yor groove members. 13, as shown in Fig. 3 of the drawings and The invention comprises a simple and efin dotted lines in Fig. 1.

25 ficient device of this character having va- Adjlrstagble wedging members 14, a detail 30 rions other details of construction, combiof one of which is shown in Fig. 4 of the nation and arrangement of parts which will dra-wings, are provided each with a central be hereinafter fully described, Ishown in the longitudinal rib 15 adapted to engage and accompanyingI drawings and then specifihave a movement within a groove in one of 30 cally defined in the appended claims. said sides, the inner face of each Wedging 85 My `invention is illustrated in the accommember being` inclined, as shown in Fig. 3

panying drawings which, with the numerals "of .the drawings. The said members 14 on of reference marked thereon, form a 'part 'the slde 3 have each two recesses 16 in the of this application, and in which; v faces thereof and apertures 18 leading of a grogshead through the members from the bottoms of 90 Figure l 1s a side elevation made `in aecordance with my invention.

-Eiggis a sectional view on line .QJ-2 of t`lg`gigi'. 1.

the recesses, it being noted that by the provisiolr of a plurality of said apertures, proa Eing-1,:,interagir is it iis is :p L :iitmazi' `lo: intl )bt email: diaenstiotixoin n 111mm al nidliststi i 1g passions l s: mhrxgng ltf itl t n to fr mi l vio the =bolts,`as shown and described. rllhe gibs aire permitted to be moved outwardly in opposite directions by reason of the bolts 19 passing through the grooves in the shank portions of the gibs and which bolts are held stationary in apertures in the gibs themselves. Said gibs are held securely by dove-tailed'connections through the medium of the bolts 10, thus securely ho-lding'the pairts to ether.

What claim to be new is:

1. An adjustable cross head having sides spaced apart, the inner faces of said vsides having beveled portions, gibs having recesses upon their op-posite faces and transverse grooves upon their inner faces, the adjacent Walls of the recesses being beveled conforming to and engaging the beveled portions of said sides, bolts passing through registering apertures in said sides and grooves, and Wedging members movable intermediate the and outer Walls of said recesses in the 2. An adjustable cross head having s ides spaced apart, the inner faces of said sides having beveled portions', gibs having recesses upon their opposite faces and transverse grooves upon their inner faces, the opposite edges of said sides being inclined, the adjacent Walls of the recesses being beveled conforming to and engaging thebeveled portions of said sides, bolts passing through registering apertures in said sides and grooves, and Wedging members movable in-.

termediate the sides and outer walls of 4said recesses in the gibs, and means for guiding thewedging members in their longitudinal movements.

3. An adjustable cross head having sides spaced apart and having inclined portions upon the inner faces thereof, gibs recessed upon their opposite faces, the adjacent Walls of the recesses being inclined and conforming to and adapted to have moving contact with the beveled portions of said sides, the inner faces of the gibs being provided Withtransverse grooves, bolts passing through registering apertures in said sides and grooves, the opposite edges of the sides being inclined, wedging members interposed bet-Ween the inclined edges yof the sides and the outer Walls of the recesses of the gibs, and having tongue and groove connection with each other, and means for holding the Wedging members in adjusted positions.

et. An adjustable cross head having sides spaced apart, and having inclined portions upon the inner faces thereof, gibs recessed upon their opposite faces, the adjacent walls of the recesses being inclined and conforming to and adapted to have moving contact with the beveled portions of said sides, the inner faces of the gibs being provided with transverse grooves, bolts passing through registering apertures in said sides and grooves, the opposite edges of the sides being inclined, and each having a longitudinal groove, Wedging members interposed. between the inclined edges of the sides and the outer walls of the recesses of the gibs, and each having a rib engaging a groove in said edge, and means for holding the Wedging 'members in adjusted positions.

5. An adjustable cross head having sides spaced apart, and having inclined portions upon the. inner faces thereof, gibs recessed upon their oppositefaces, the adjacent Walls of the recesses being inclined and conforming to and adapted to have moving contact with the beveled portions of said sides, the inner faces 4of the gibs being provided with transverse grooves, bolts passing through registering .apertures in said sides and grooves, the opposite edges of the sides being inclined, and each havingl a longitudinal groove, Wedging members interposed between the inclined edges of the sides andthe outer Walls of the recesses of the gibs, aand-each having a rib engaging a groove in said edge, and means for holding the Wedging members in adjusted positions.

In testimony whereof I hereunto affix my signature.

HEDORE ROGTCHOF'F. 

